Collins (No Ordinary Family) tweeted earlier today that he’s doing a spot on the show, adding the cast is a “ridiculously fun & talented group, including @Rainnwilson who I worked w/in his 1st job in ‘89 in the Park.” The actor will play Andy Bernard’s (Ed Helms) father on the show.

And who will play Andy’s mom? EW can exclusively report that role goes to Dee Wallace (E.T, Sons & Daughters).

The news comes on the heels of EW learning that The Office is looking to keep the much-discussed manager post in the family. See that interview with Office showrunner Paul Lieberstein and new boss James Spader here.